Roll construction



Aug. 18, 1964 w, ALBERT 3,144,905

ROLL CONSTRUCTION 3 Sheets-Sheet 1 Filed Nov. 15, 1960 wozgm m\ INVENTORWILLIAM ALBERT BY Q'N ATTORN Y Aug. 18, 1964 F iled Nov. 15, 1960 w.ALBERT 3,144,905

ROLL CONSTRUCTION 3 Sheets-Sheet 3 em -2|s 2IO INVENTOR 224 WILLIAMALBERT ATTORNEY United States Patent 3,144,995 BULL CONSTRUCTION WilliamAlbert, 395 W. Evans St, Middlesex, NJ. Filed Nov. 15, 1969, Ser. No.69,372 6 Claims. (Cl. 165-89) This invention relates to a new andimproved roll construction and, in particular, to a roll provided with aresiliently mounted and removable roll surface and to such a rollwherein a heat exchange medium may be directed adjacent the undersurfaceof the resiliently mounted roll surface for heating or cooling same.

It is a particular object to provide a new and improved roll having aresiliently mounted removable roll surface which may be provided withmeans for directing dual streams of a heat exchange medium incountercurrent direction adjacent the undersurface of the resilientlymount-' ed roll surface.

A further object of the invention is to provide such a roll havingparticular utility in the production of plastic films, paper, asphaltshingles, asbestos cement shingles, and products where surface contouror finish of a product is dependent on the outside diameters ofcylinders or rolls.

A further object is to provide such a roll which is simple inconstruction, relatively inexpensive to manufacture and is provided witha roll surface which may be readily removed for repair, reconditioning,or interchanged with other roll surfaces.

A further object of the invention is to provide such a roll atconsiderable reduction in cost and time of construction and is adaptedto maintain down time caused by damage to the outside diameter of theroll at a minimum.

These objects are fully accomplished by a roll comprising a shaft havingends adapted for rotatably mounting the shaft, a first rigid sleeve, acircular plate member rigidly connecting each end of the first sleeve tothe shaft, a second rigid sleeve having an inside diameter greater thanthe outside diameter of the first sleeve and adapted to betelescopically received over the first sleeve, expansible tubingreceived between the outer cylindrical surface of the first sleeve andthe inner cylindrical surface of the second sleeve, and means forexpanding the expandible tubing whereby the second sleeve rotates withthe first sleeve; and to such a roll construction including means fordirecting a heat exchange medium through and/or about the expansibletubing.

Other objects and advantages of the present invention will be moreapparent to those skilled in the art from the following detaileddescription of the invention when considered in conjunction with theillustrative embodiments thereof wherein:

FIG. 1 is a longitudinal sectional view of one form of the improved rollconstruction of the present invention;

FIG. 2 is a sectional view substantially on line 22 of FIG. 1;

FIG. 3 is a sectional view substantially on line 3-3 of the roll shownin FIG. 1;

FIG. 4 is a fragmentary longitudinal sectional View of a further form ofroll constructed in accordance with the teachings of the presentinvention and adapted for countercurrent flow of a heat exchange mediumabout the inner surface of the outer roll sleeve;

FIG. 5 is a section substantially on line 55 of the device shown in FIG.4; and

FIG. 6 is an enlarged fragmentary sectional view of a further form ofmeans for conducting dual streams of a heat exchange medium to the endsof the roll shaft.

Referring to the drawings and in particular to FIGS. 1, 2 and 3 thereof,ltl generally designates a roll constructed in accordance with theinvention. The roll is provided with a central shaft 12 having ends 14and 16 adapted to be received in conventional bearing means forrotational mounting of the shaft.

The roll 10 includes a first cylindrical sleeve 18 preferablyconstructed' of a rigid material such as rolled steel. The first sleeve18 is rigidly mounted to the shaft 12 by a pair of circular spaced steelplates 20 and 22 adjacent one end of the first sleeve 18 and identicalplates 20' and 22' adjacent the opposite end. The plates 20, 22, 20' and22' may be welded to the shaft and the inner surface of the sleeve 18.

End 14 of the shaft 12 is provided with an axial bore 24 which boreintersects a plurality of radial bores 26. The opposite end 16 of theshaft 12 is provided with an axial bore 24' and a plurality of radialbores 26 similar to the axial and radial bores 24 and 26 at end 14 ofthe shaft 12. The radial bores 26 open into the space be tween the pairof circular plates 20 and 22 while the radial bores 26 open into thespace between the circular plates 20' and 22'.

The first sleeve 18 is provided with a plurality of open-f ingsgenerally designated 28 adjacent end 14 of shaft 12 which openings arepositioned between the pair of plates 26 and 22, while similar openings28' are provided in the sleeve 18 between plates 20 and 22' at end 16 ofthe assembly. t

In order to provide for a pressure balance between the inner surface ofthe first sleeve 18 and the atmosphere, one or both of the ends of theroll may be provided with a pressure equalizing tube 33 which tube, asmore clearly illustrated in FIG. 1 of the drawings, passes through andis secured about aligned bores in the pair of end plates 20 and 22.

The outer cylindrical surface of the sleeve 18 is provided with a pairof generally circular grooves 30 and 30 and a continuous helical groove32 connecting the. pair of grooves 30 and 30'. The size of the grooves3030' and the helical groove 32 are such that a portion of the surfaceof expansible tubing generally designated 34 may be received therein.The expansible tubing 34 has a pair of generally circular ends 36 and36' adapted to be received in grooves 30 and 30' respectively and acenter section generally designated 38 adapted to be received in thehelical groove 32 and to connect the pair of the generally circular ends36 and 36'.

The expansible tubing may be constructed of wrapped braided metal,rubber, rubber-cored braided metal, plastic, or combinations thereof andthe form of the tubing 34 would to some extent depend upon the pressurerequired in the tube and Whether a heating or cooling heat exchangemedium is to be passed therethrough or thereabout.

In the form of the invention illustrated in FIGS. 1 through 3 of thedrawings, end 40 of generally circular tube portion 36 has connection toa valved coupling 42 through a short pipe section 44. The opposite end36 of the tube is similarly connected to a valved coupling 42'. The freeend of the valved outlet coupling 42 is provided with a short threadedadapter 46 while a similar threaded adapter 46' is provided at theopposite end of the roll. The threaded adapters 46 and 46 receiveconventional connectors whereby pressure fluid may be conducted into theexpansible tubing 34 as to be more fully described hereinafter.

The roll assembly also includes a second cylindrical shell 48. Thecylindrical shell 48 has an inside diameter greater than the outsidediameter of the first cylindrical shell 18 and the cylindrical shell 48is adapted to be telescopically received over the first cylindricalshell 18 and the expansible tubing 34. The outer cylindrical surface 50of the second shell 48 comprises the roll surface. The particular formof the surface 50 is dependent on the ultimate use of the improved roll.For example, where the roll is to provide a smooth calendered surface onpaper, plastic and the like, the outer surface would be accuratelymachined anl preferably provided with an electroplated coat of chromium.

It will also be appreciated that the roll surface 50 may have a designconfiguration thereon where the roll is to impart a design on thesurface of the material being processed.

Adjacent the ends of sleeve 48, the inner surface 52 of the sleeve isprovided with a generally circular groove 54 adjacent end 14 of theshaft 12 and 54 adjacent the other end. Grooves 54 and 54 correspond toand cooperate with grooves and 30 in the outer surface of thecylindrical sleeve 18, and are adapted to receive a portion of thegenerally circular ends 36 and 36 of the expansible tubing 34.

It will also be apparent that where desired a generally helical groovecould be provided in the inner surface of the outer sleeve 48corresponding to the helical groove 32 in the outer surface of thesleeve 18. However, it has been found that very satisfactory results areprovided where only the generally circular grooves 54 and 54' areprovided on the inner surface of the second sleeve 48.

In operation of the roll shown in FIGS. 1 through 3 of the drawings, theshaft ends 14 and 16 are mounted for rotation in conventional bearingmeans carried by the processing machine. The second sleeve 48 is mountedto rotate with the first sleeve 18 and the shaft 12 by expanding theexpansible tubing 34. In general, a medium sized roll will require about150 lbs. per square inch pressure in the tubing 34 to adequately mountthe sleeve 48 to the sleeve 18. The pressure is directed to the tubing34 through one of the valve couplings 42 from a convenient source of gasor liquid pressure fluid, such as a standard high pressure nitrogen orcarbon dioxide cylinder, and then the appropriate valve 42 or 42' isclosed and thepressure cylinder or source of pressure fluid isdisconnected from the threaded outlet 46 or 46'.

Where a heat exchange medium is to be circulated about the helicalexpansible tubing 34 from one end 14 to the opposite end 16 of the roll,the extended ends of the shaft 12 are connected by swivel couplings to asource of cooling medium whereby the cooling medium is directed, forexample, through axial bore 24, radial bores 26, openings 28 in sleeve18 about the helically arranged expansible tubing 34, out openings 28,radially bores 26' and axial bore 24' to a further swivel connection.

The distance between the volutes of the helically arranged expansibletubing may be varied to support greater or lesser weights and can bevaried to permit greater or lesser volumes of heat exchange medium tocirculate between the inner surface of the outer shell 48 and the outersurface of the inner shell 18.

Where it is necessary to remove the outer shell 48 for replacement,repair, cleaning and the like, the pressure maintained in the expansibletubing 34 is released through one of the valved couplings 42 or 42',thereby collapsing the tube and permitting the ready removal of theouter sleeve 48.

Where it is desired to maintain the temperature of the outer surface ofthe second sleeve of the roll substantially uniform, it has been foundthat it is desirable to pass a heat exchange medium in one directionabout the helically arranged expansible tubing 34 and in the oppositedirection through the tubing 34. In such a construction, the heatexchange medium passing through the expansible tubing is passed throughunder pressure whereby the heat exchange medium provides the source ofpressure for maintaining the outer shell 48 in operating relationship tothe shaft 12 in addition to the means for maintaining the surface of theroll at a substantially uniform temperature.

One form of the present invention adapted for countercurrent travel ofthe heat exchange medium is illustrated in FIGS. 4 and 5. Referring tothese drawings, the roll generally designated includes a shaft 112having extended ends 114 and 116 adapted to be rotatably received inconventional bearings. The shaft 112 supports a first cylindrical sleeve118 on pairs of spaced plates 128, 122 and 120' and 122 adjacent ends114 and 116 of the roll shaft 112.

The roll also includes a second or outer cylindrical shell 148 which istelescopically received in spaced relation over the first shell 118 asdescribed in reference to the form of the invention shown in FIGS. 1through 3 of the drawings. Expansible tubing 134 provided with thegenerally circular ends 136 and 136' is connected by conduit means and160' to generally radial bores 162 and 164 adjacent ends 114 and 116 ofshaft 112. It will be particularly noted that radial bore 164 has alesser diameter than radial bore 162. Radial bore 162 communicates witha generally longitudinal bore 166 provided in shaft end 114 whilegenerally radial bore 164 communicates with a generally longitudinalbore 166'.

The space between the helically arranged expansible tubing 134communicates with axial bore 124 and adjacent end 114 and a similar bore124 adjacent end 116 of shaft 112 through generally radial bores 126 and126' and openings 128 and 128' respectively. Each end of the shaftmounts a swivel joint generally designated 168 adjacent end 114 and 168adjacent end 116. The swivel joints 168 and 168' are adapted to providetwo fluid conducting passages in unbroken communication during relativerotation of the parts of the swivel joints.

Swivel joints 168 and 168 are identical in form and include a stationaryelement 170 rotatably mounted to the rotatable element 172. The rotatingelement 172 is rotatably mounted to the rotating element 170 of theswivel joint 168 by conventional thrust bearing means generallyindicated at 187. Rotatable element 172 is provided with a flangeportion 174 which is secured to the end of shaft 114 by bolts or thelike 176'. The rotatable element 172 has an axial opening whichthreadedly receives a bushing 176 which mates with the bore 124 in theshaft 114.

The rotatable element 172 also is provided with a bore receiving abushing 180 which bushing is adapted to be received in the bore 166 inthe shaft 114. Bushing 176 communicates with an axial bore 182 providedin the stationary portion 170 of the swivel joint. The bore 182 in thestationary portion of the swivel joint is connected by a conduit 184 toa source of heat exchange medium. In this form of the invention, theconduit 184 is the return conduit for the heating medium flowing aboutthe helical path between the volutes of the expansible tubing 134 asshown by the directional arrows.

The stationary section 170 of the swivel joint 168 is provided with anannular chamber 186 which annular chamber communicates with a pipe orconduit 188 connected to a source of heat exchange fluid under pressure.The annular chamber 186 communicates with the annular space 190 betweencylindrical wall 192 of the rotating section 180 of the joint andstationary wall portion 194 of the stationary element of the swiveljoint. The annular space 190 communicates with the bushing 180 wherebythe heat exchange medium under pressure flows through bore 166, radialbore 162, flexible conduit 160, to and through the expansible tubing134.

At end 116 of the improved roll the heat exchange medium flowing throughthe tubing is exhausted from the shaft via the coupling 168 andspecifically through pipe 200 which communicates with annular space 202which in turn communicates with the bushing 204.

As hereinbefore set forth conduit 164 in end 116 of the shaft 112 is ofa smaller diameter than the corresponding radial bore 162 in end 114 ofshaft 112. The constricted bore 164 cooperating with the source ofpressurized heat exchange liquid pressurizes the expansible tubes 134maintaining the second sleeve 148 in substantially fixed relation to theinner sleeve 118.

It will be particularly noted that with a portion of the heat exchangeliquid flowing in the direction of the directional arrows through theexpansible tubing and another portion of the heat exchange liquidflowing about the helically arranged flexible tubes 134 and in theopposite direction to the flow of the medium through the tubes that veryuniform temperature control of the surface of the outer cylindricalmember 148 is obtainable.

In this form of the invention as in the form of the invention shown inFIGS. 1 through 3, a tube 208 extending between and through at least apair of the circular plates 120 and 122 maintains the pressure withinthe roll at substantially ambient pressure.

Referring to FIG. 6 of the drawings, a modified swivel joint adapted toprovide two fluid conducting paths or passages in unbroken communicationwith the rotating shaft of the roll is illustrated. This form of theswivel joint for the improved roll has particular advantage where theroll is not adapted for high-speed operation and antifriction bearingmeans for the swivel joint are not required.

Referring specifically to FIG. 6, 210 designates a shaft for a roll suchas shown in FIG. 4 of the drawings, which shaft is provided with aconduit 212 for directing a cooling medium about the space between thehelically arranged flexible conduits of the roll. The shaft 210 isprovided with a further conduit 214 which is adapted to direct a heatexchange medium under pressure to and through the expansible tubings.

Each end of the shaft 210 may be conveniently provided with a bearingplate 216, which bearing plate is provided with bores 218 and 220adapted to communicate with the conduits 212 and 214 respectively.

The said extended end of the shaft 210 rotatably receives a fixed block222 which is provided with a large bore 224 adapted to snugly receivethe end of the shaft 210 and the fixed block 222 is maintained inoperating relationship to the end of the shaft 210 by a conventionalsnap-ring arrangement 226. The fixed block 222 has an axial bore 228which axial bore communicates with the opening 218 in the bearing plate216 and conventional conduit means generally indicated at 230 isthreadedly received in the bore 228.

The fixed block 222 is also provided with a bore 232 which borethreadedly receives a conventional conduit 234 connected to a source ofheat exchange liquid under pressure. The inner end 236 of bore 232communicates with an annular chamber 238 whereby continuouscommunication is maintained between the bore 232 in the fixed block 222and the opening 220 in the rotating shaft 210.

As previously described with reference to FIG. 4, the other end of theroll shaft would be provided with a substantially identical fixed blockfor directing heat exchange medium about the helically arrangedexpansible tubings and to and from the tubing.

While plural forms of the improved roll constructlon have beenspecifically illustrated in the drawings and described in the foregoingspecification, it will be apparent to those skilled in the art thatvarious modifications may be made in the form and shape of thestructures without departing from the scope of the appended claims.

I claim:

1. A roll construction comprising a shaft having ends adapted forrotational mounting of said shaft, a first rigid sleeve, means forrotating said first rigid sleeve upon rotation of said shaft, said meanscomprising first circular plate means rigidly connecting each end of thefirst sleeve to said shaft, a second rigid sleeve having an insidediameter greater than the outside diameter of said first sleeve andadapted to be telescopically received over said first sleeve, means forrotating said second sleeve upon rotation of said shaft, said means forrotating said second sleeve consisting solely of expansible tubingreceived between the outer cylindrical surface of said first sleeve andthe inner surface of said second sleeve, and means for expanding saidexpansible tubing whereby said second sleeve rotates with said firstsleeve and each rotates with said shaft, said expansible tubing beingpositioned in a helical array across the outer surface of said firstsleeve and in contact with the inner surface of said second sleeve.

2. The invention defined in claim 1 including means for directing a heatexchange medium about the volutes of the helically arranged tubing.

3. The invention defined in claim 1 including means for directing a heatexchange medium under pressure through said expansible tubing.

4. The invention defined in claim 1 including means for directing a heatexchange medium about the volutes of the helically arranged tubing, andmeans for directing a heat exchange medium under pressure through saidhelically arranged expansible tubing.

5. A roll comprising a shaft having ends adapted for rotatably mountingsaid shaft, a first rigid metallic sleeve, a pair of spaced circularplate members rigidly connecting each end of said first sleeve to saidshaft, said first sleeve having a generally circular groove in the outersurface thereof adjacent the ends of the sleeve and a generally helicalgroove connecting said generally circular grooves, a second rigidmetallic sleeve having an inside diameter greater than the outsidediameter of said first sleeve and adapted to be telescopically receivedover said first sleeve, a pair of generally circular grooves on theinner surface of said second sleeve and corresponding to the generallycircular grooves in said first sleeve, expansible tubing receivedbetween the outer cylindrical surface of said first sleeve and the innercylindrical surface of said second sleeve in said generally cylindricalend grooves and said helical groove, means for expanding said expansibletubing whereby said second sleeve rotates with said first sleeve, anaxial bore in each end of said shaft, radial bores in said shaftcommunicating with each of said axial bores, said radial bores beingpositioned between each of said pairs of circular plates securing saidfirst sleeve to said shaft, and openings in said first sleeve to permitthe flow of a heat exchange medium through said axial bores, said radialbores, said openings in said first sleeve, and about the expansibletubings received in the generally helically arranged grooves.

6. The invention defined in claim 5 wherein the means for expanding saidexpansible tubing includes means for directing a heat exchange mediumunder pressure through said expansible tubing.

References Cited in the file of this patent UNITED STATES PATENTS1,583,333 Bigum May 4, 1926 2,062,321 Levin Dec. 1, 1936 2,141,645Fawick Dec. 27, 1938 2,250,325 Barnes July 22, 1941 2,388,003 McCulloughOct. 30, 1945 2,425,599 Cox Aug. 12, 1947 2,725,218 Cuming Nov. 29, 1955UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,144,905 August 18, 1964 William Albert It is hereby certified that errorappears in the above numbered patent requiring correction and that thesaid Letters Patent should read as corrected below.

In the heading to the printed specification, line 3, for "WilliamAlbert, 305 W. Evans -St. Middlesex, N. J." read William Albert,Middlesex, N. J. (305 W. Evans St. Florence, Sn (L) Signed and sealedthis 22nd day of December 1964.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD A], BRENNER Attesting Officer Y Commissioner ofPatents

5. A ROLL COMPRISING A SHAFT HAVING ENDS ADAPTED FOR ROTATABLY MOUNTINGSAID SHAFT, A FIRST RIGID METALLIC SLEEVE, A PAIR OF SPACED CIRCULARPLATE MEMBERS RIGIDLY CONNECTING EACH END OF SAID FIRST SLEEVE TO SAIDSHAFT, SAID FIRST SLEEVE HAVING A GENERALLY CIRCULAR GROOVE IN THE OUTERSURFACE THEREOF ADJACENT THE ENDS OF THE SLEEVE AND A GENERALLY HELICALGROOVE CONNECTING SAID GENERALLY CIRCULAR GROOVES, A SECOND RIGIDMETALLIC SLEEVE HAVING AN INSIDE DIAMETER GREATER THAN THE OUTSIDEDIAMETER OF SAID FIRST SLEEVE AND ADAPTED TO BE TELESCOPICALLY RECEIVEDOVER SAID FIRST SLEEVE, A PAIR OF GENERALLY CIRCULAR GROOVES ON THEINNER SURFACE OF SAID SECOND SLEEVE AND CORRESPONDING TO THE GENERALLYCIRCULAR GROOVES IN SAID FIRST SLEEVE, EXPANSIBLE TUBING RECEIVEDBETWEEN THE OUTER CYLINDRICAL SURFACE OF SAID FIRST SLEEVE AND THE INNERCYLINDRICAL SURFACE OF SAID SECOND SLEEVE IN SAID GENERALLY CYLINDRICALEND GROOVES AND SAID HELICAL GROOVE, MEANS FOR EXPANDING SAID EXPANSIBLETUBING WHEREBY SAID SECOND SLEEVE ROTATES WITH SAID FIRST SLEEVE, ANAXIAL BORE IN EACH END OF SAID SHAFT, RADIAL BORES IN SAID SHAFTCOMMUNICATING WITH EACH OF SAID AXIAL BORES, SAID RADIAL BORES BEINGPOSITIONED BETWEEN EACH OF SAID PAIRS OF CIRCULAR PLATES SECURING SAIDFIRST SLEEVE TO SAID SHAFT, AND OPENINGS IN SAID FIRST SLEEVE TO PERMITTHE FLOW OF A HEAT EXCHANGE MEDIUM THROUGH SAID AXIAL BORES, SAID RADIALBORES, SAID OPENINGS IN SAID FIRST SLEEVE, AND ABOUT THE EXPANSIBLETUBINGS RECEIVED IN THE GENERALLY HELICALLY ARRANGED GROOVES.